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  1. 1st Gen Engine Talk - I4, I5, and V8
    I've got an '06 3.5L 4x4 extended cab that I'm currently trying to get back to smooth sailing... Originally bought it misfiring at idle, P0303, P0420, and codes for the camshaft sensors (can't remember them now). Also started noticing a low oil light at idle after the engine was getting on the...
    compression coolant temperature p0420 poor acceleration rough idle
  2. General Truck Chat
    Hello All, I have a 09 chevy colorado 2.9 L 120xxx miles. I'm so stumped I have a p0420 and had not one but three different type of cats put on this truck the third one being the high dollar one with 2 brand new 02 sensors. I checked all the vacuum lines that I could find and had it smoke...
    catalytic lean p0420
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